1973, when Seiko was not shy to go slightly nuts on Quartz -- and there is nothing wrong going slightly nuts in watches, in general as it is not paramedics and experiments don't hurt -- they presented their first multi-faceted case (made of extra hardened steel) with a multi-faceted glass (on the photo of course without glass, obviously) and a multi-colored dial. An iconic and outstanding eye-catcher on the wrist back-then and even 50y later.